Wire mesh strainer or the like



Feb. 12, 1952 1N VEN TOR. FRANK BE RMAN Patented Feb. 12, 1952 UNITED STATES PATENT OFFICE WIRE MESH STRAINER on. THE LIKE Frank Berman, Brooklyn, N. Y. Application March 9,1948, Serial No. 13,783

1 Claim. 1

This invention relates to new and useful improvements in wire mesh strainers or the like; within which latter term is included any generally bowl-shaped article wherein the bowl-proper is shaped from a sheet of foraminous material, as a netting woven from metal or other strands, and wherein such bowl-proper is marginally secured within a sheet-metal encircling frame. An example of such a bowl-shaped article, other than a strainer, and an improved construction for which is provided by the invention, is one for attachment to a bird-cage for being contained therein to afford a nest support.

The present invention proposes certain improvements in the strainer forming the subject matter of my co-pending allowed application Serial No. 778,901, filedOctober 9, 1947, now

I Patent No. 2,532,052,

An object of the invention is to provide a novel and valuable combination of such a foraminous sheet and a sheet-metal encircling'frame, with the latter so laterally shaped and crimped relative to a marginal portion of said sheet that a degree of: tightness and dependability of interlock is achieved which heretofore has been found impossible of attainment, and toaccomplish this without the inclusion of a round-wire frame of the kind commonly added so as to be embraced by the sheet-metal frame for coacting with the latter in seeking to anchor securely the marginal portion of the foraminous sheet.

According to the invention, the sheet-metal frame is laterally shaped to present an outer downwardly and inwardly inclined wall, an inner upwardly and outwardly inclined wall spaced inwardly from and forming a continuation of the bottom of the first-named wall, and a downwardly', inwardly, and then upwardly outwardly curled top component forming a continuation of the upper end of said first-named wall and located inwardly of and opposite the upper portion of the second-named wall. Said curled component also, preferably, is further terminally curled inwardly and downwardly, to result in said component, have a spiral cross-section incorporating an inner and an outer convolution.

The marginal portion of the foraminous sheet is reversely bent, so that an inner subdivision of the width of said portion may lie against the inner side of the second-named wall and an outer, depending subdivision of the width of said portion may be rested between the first-named wall and the second-named wall; whereby when said curled component is crimped against the secondnamed wall said foraminous sheet is clamped between said component and the second-named wall, While at the same time, the line of reverse bend of said marginal portion is present as a hook means straddling the top of the second-named wall. I

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings, and to the appended claim in which the various novel features of the invention are more particularly set forth.

In the accompanying drawings forming a material part of this disclosure:

Fig. 1 is a perspective view showing a strainer pursuant to the invention.

Fig. 2 is an enlarged detail view, partially infragmentary perspective view of a section taken on the line 2-2 of Fig. l; and showing the completed interlock between the foraminous sheet and the sheet-metal frame.

Fig. 3 is a view similar to Fig. 2, so far as said frame is concerned, for showing the shape thereof prior to attachment thereto of the marginal portion of said sheet.

Fig. 4 is a view similar to Fig. 1 showing a birdcage appliance pursuant to the invention.

Fig. 5 is a top plan view of said appliance.

Fig. 6 is a view similar to Fig. 3 showing a modified construction for the sheet-metal frame.

Referring to the drawing in detail, and first to Figs. 1-3, the type of strainer shown, the size of which is immaterial, as is also the shaping of the central portion of the strainer sheet IQ, is one wherein the sheet H1 is illustrated as dished at its central portion to provide a depending bowlproper.

This sheet is marginally interlocked, as shown in Fig. 2, with a sheet-metal frame I l such interlock resulting in part from reversely bending the marginal portion of the sheet In in such manner With the frame ll arranged as in Fig. 3, that is, with the curled component I! up above the wall I6 as there shown, it is an easy matter to hook the marginal portion IZ-M of the sheet' I over the upper extremity of the wall I 6; whereupon all that is required to establish the interlock is to curl down the Wall portion marked I8 in Figs. 2 and 3 to swing the curled component I? downwardly and outwardly to the location shown in Fig. 2 and sufficiently forcibly to'crimp said component tightly against the subdivision I4 of the marginal portion of the sheet I0. 7 An exc dirigly tight interlcick thereby provided between the sheet ID and the frame I I, and. one of such nature that it is practically impossible to break the interlock by any pulling stress de-" liberately applied to the sheet I0 short of a force great enough to rupture the strands of the latter.

As the invention is now understood, it is ad'- vantageous to have the top of the wall; I5 some slight distance below the upper limit of 'the inner convolution of the curled component I1; with, however, the area of said component which clamps thersheet I0 betweenit and. the wallrlfi well down along'the height of said wall; and am to have the walls I5 and I6, with the latter inclinedsubstanti'ally asshown, soarranged that the extreme inward point of the wall I6 is outward relative to the extreme inward point of the component I'I.

Between the walls I5 and I6, it will be noted, there is provided a deep inwardly downwardly inclined pocket, I9, for receiving the subdivision I2 of the marginal portion of the sheet II! when said subdivision itself is of considerable width, Exteriorly, the entire device is of exceedingly attractive appearance circumferentially thereof, and all around the frame longitudinally and laterally thereof. 'In, accordance with familiar practice, the frame II is conveniently made of a strip: of sheet metal long enough to encircle the rim of the device, so that the two ends of the frame may meet at some selected point around said rim, as at, H. V

Referring to Figs. 4 and 5, theseshow a device including a bowl-epro'per jcorresponding to the rim of the device, there is suitably attached to r the frame, as by welding,- ;a U-shaped fitment 2-I ;-so that there will be projected from the frame a 'pair 'of legs 22. ,This fitment is desirably of a non-elastically and, deadly flexible metal,

whereby the device maybe inserted into a birdcage and secured at a desired level therein by bending thelegs 22 into engagement with selected ones of the bars of the cage. I

. In Fig; 6 a modification ofthe frame II'flis illustrated which incorporates means, in i the formof a; reenforcing element, attlie junction of the outer downwardly and inwardly inclined 4 wall l5 and the inner upwardly and outwardly inclined wall I6 for reenforcing the frame. This reenforcement takes the form of a length of wire 30. extended completely around the junction of the walls I5 and I6 and which is retained in position by the formation of the Walls I5 and I6.

In other respects this form of the invention is similar to that previously described and like rererenc'enu erais identify are parts each of the several views.

While I have illustrated and described the preferred embodiments of my invention, it is to be understood that I do not limit myself to the precise constructions herein disclosed and the right is reserved to all changes and modifications coming with-in the scope of theinvention as defined in the appended claim.

Having thus described my invention, what I claim as new and desire to secure by United States Letters Patent is: m a

Meansfor finishing and reinforcing the top edge of abowl-shapedstrainer sheet which h as its top'edge' portion bent outward and-down ward, comprising a circular, strainer frame having an outwardly convexed outer wall inclined substantially downward andinward, said outer wall continuing at its bottom edge into a flat inner wall spaced from the inner face of said outer wall and inclined upwardly and outwardly and over the top' edge of which the strainer sheet is engaged with its top edge-por tion depended freely in the spacebetween the adjacent faces of said inner and outer walls, said outer wall continuing at its top edge into a curled portion located slightly inward and up: ward of the" top edge of said inner wall and clamped against the strainer sheet where it passes over the top edge of said inner wall;- the junction of said inner wall with-said outer wall being smoothly rounded, acircular wire having a cross-section corresponding to the roundness of said junction positioned in said junction below the free edge of the outwardly and downward-1y bentt'op 'ed-ge'portionof the strainer sheet, said wire being retained in position in said junction by the formation of said inner and outer walls.

REFERENCES i'riii) I The following references are of-record. in-the file of this patent:

UNITED STATES PATENTS Nuifnper; Name Date 33,397 Des Isles Dec. 10,1991 1,27 ,992 Tradejevieh Aug. '27, 1913 2,006,566 Zimmer July 2, 1935 ,023,9 0 Bachemor DdJlQ, r935 ,2,il,35l Denhard Nov 1 7, 1936 21532052 Ber-man Nov. 28, 1950 

